Wifi issue on Ubuntu 10.10 - HP laptop G62-B45

**ipmurali** · 03-10-2011

Hi friends,

I have installed ubuntu 10.10 on my new HP laptop G62-B45 as dual boot with Windows 7 Home.

WINDOWS : WIFI Working, without any issues.
UBUNTU 10.10 : Wifi working some time and I can use the internet, but some time not working, even the wifi status shows as connected.

(Surprisingly, I have a similar set up, this I made for my friend, working fine without any problem.)

When I checked
SYSTEM->ADMINISTRATION->ADDITIONAL DRIVERS
I can see only driver for ATI adapter.
My WIFI issue is due to driver problem?

Hope somebody can help me.
Thanks in advance.
-Murali

**reed9** · 03-10-2011

Post the output of

Code:

sudo lshw -C network

When it stops working, look at the output of

Code:

dmesg | tail

**ipmurali** · 03-13-2011

Thanks reed9,

Below are the outputs.

Code:

lshw -C network

*-network
description: Ethernet interface
product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 02
serial: 3c:4a:92:00:79:de
size: 10MB/s
capacity: 100MB/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half latency=0 link=no multicast=yes port=MII speed=10MB/s
resources: irq:43 ioport:2000(size=256) memory:c0410000-c0410fff memory:c0400000-c040ffff memory:c0420000-c043ffff
*-network
description: Wireless interface
product: RT3090 Wireless 802.11n 1T/1R PCIe
vendor: RaLink
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 00
serial: e0:2a:82:1f:39:a5
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rt2800pci driverversion=2.6.35-27-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:18 memory:c2400000-c240ffff

Code:

dmesg | tail

[ 25.247462] Skipping EDID probe due to cached edid
[ 25.297072] Skipping EDID probe due to cached edid
[ 25.916717] Skipping EDID probe due to cached edid
[ 30.124892] Skipping EDID probe due to cached edid
[ 93.063938] usb 2-1.3: new low speed USB device using ehci_hcd and address 3
[ 93.219124] usbcore: registered new interface driver hiddev
[ 93.221259] input: USB Optical Mouse as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input9
[ 93.221454] generic-usb 0003:04B3:310C.0001: input,hidraw0: USB HID v1.11 Mouse [USB Optical Mouse] on usb-0000:00:1d.0-1.3/input0
[ 93.221484] usbcore: registered new interface driver usbhid
[ 93.221488] usbhid: USB HID core driver

**reed9** · 03-13-2011

So there are two drivers available for your card. The rt2800pci, which is what you're using, looks to be the main driver these days and where development is focused. However, it's relatively new, and some people do find the other driver works better.

The second driver is the rt2860sta. The sta = staging driver, which means for whatever reason, bugs, poor coding, etc, the driver is not able to be included in the mainline kernel and is relegated to the staging area of the kernel. But that doesn't mean it might not work better for you and is worth a try.

To try it out unload the rt2800pci and load the rt2860sta

Code:

sudo modprobe -r rt2800pci
sudo modprobe rt2860sta

To make it persistent on boot blacklist the rt2800pci and add rt2860sta to the list of modules to be loaded

Code:

echo "blacklist rt2800pci" | sudo tee -a /etc/modprobe.d/blacklist.conf
echo "rt2860sta" | sudo tee -a /etc/modules

EDIT: It's possible this will rename your wireless interface from wlan0 to ra0. Check the output of iwconfig to see. In some network manager programs, like wicd, you'd need to change the configuration to reflect the new device name.

**ipmurali** · 03-13-2011

thanks reed9 for your fast response.
I tried the commands,
But now wireless not at all showing.

when I given the command

Code:

lshw -C network

wireless network part not listing.

Code:

iwconfig

gives output as

lo no wireless extensions.
eth0 no wireless extensions.

NOTE: As i mentioned in my first post, my friend's laptop same HP G62-B45, using the same driver (rt2800pci) and it is working without any problem.

**reed9** · 03-14-2011

No errors? It should be supported the rt2860sta.

Check the output of

Code:

lsmod | grep rt

to see what's loading.

And it's easily reversed.

Code:

sudo modprobe -r rt2800pci
sudo modprobe rt2860sta

And if you did either of the "echo" commands, those are just writing to text files. Open up the files in your preferred text editor and remove or comment out the line. ie

Code:

gksudo gedit /etc/modprobe.d/blacklist.conf

According to the Debian wiki, rt2800pci and rt2860sta both don't work properly for wireless-n networks. Perhaps that is the issue?

I'm not finding much outside of people having success switching drivers.

**ipmurali** · 03-14-2011

Yes!
It is solved!
Working fine now.
Thanks a lot for the support.

**reed9** · 03-14-2011

Great! Care to share what the solution was?

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